RNDR: Sub-Electron Noise with DEPFET APS

The idea of a RNDR (repetitive non destructive readout) detector is measuring the collected signal charge multiple times. By taking the average value of many of these measurements the readout noise can be reduced by 1/sqrt(number of measurements), e.g to 1/10 for 100 measurements. Our RNDR device is realised by a combination of two DEPFETs.